I actually think that the world of Final Fantasy XV isWhat if the double whammy twists are that Xenoblade X is also set on Earth and Final Fantasy XV is set on Earthty lightning returns
the world at the end of Lightning Returns and that the "Etro" of this world would be Lightning.
I don't know,I actually kinda want a game that has those crazy landscapes and the devs are like "yup, that's Earth."
Joking, They kind of did it already in Xenoblade =P